Math Calculators
Percentages, fractions, algebra, and core math.
Percentage Calculator
Three calculators in one: find X% of Y, find what % X is of Y, and find percent change from X to Y. All formulas shown below so you can verify or learn the math.
Fraction Calculator
Enter two fractions and an operation to get the simplified result, decimal equivalent, and mixed number form.
Scientific Calculator
Enter a value and select a function to compute sin, cos, tan, log, ln, sqrt, factorial, powers, and more.
Square Root Calculator
Enter a number to instantly get its square root, cube root, or nth root — plus whether it's a perfect square or cube.
Percentage Change Calculator
Enter two values to instantly calculate the percentage change, or find what percent one number is of another.
Ratio Calculator
Enter A and B to simplify A:B to lowest terms and convert it to a fraction, decimal, and percentage.
Average Calculator
Enter any list of numbers to instantly see mean, median, mode, range, and standard deviation.
Prime Number Checker
Enter a number to instantly see if it's prime, its prime factorization, and the nearest primes.
GCF & LCM Calculator
Enter two integers to instantly find their GCF (greatest common divisor) and LCM (least common multiple).
Quadratic Formula Calculator
Enter a, b, and c to solve ax² + bx + c = 0 and find roots, vertex, and discriminant.
GPA Calculator
Enter course grades and credits to calculate your semester and cumulative GPA.
Grade Calculator
Enter scores and max points to calculate your grade percentage and letter grade.
Wind Chill Calculator
Enter temperature and wind speed to calculate wind chill, frostbite risk, and exposure limit.
Area Calculator
Select a shape and enter dimensions to calculate area and perimeter.
Pythagorean Theorem Calculator
Enter two sides of a right triangle to find the third side, angles, area, and perimeter.
Standard Deviation Calculator
Enter a list of numbers to calculate mean, median, standard deviation, and variance.
Slope Calculator
Enter two coordinate points to calculate slope, line equation, length, midpoint, and angle.
Roman Numeral Converter
Enter a number (1–3999) or Roman numeral string to convert instantly.
Binary to Decimal Converter
Enter a binary, decimal, octal, or hex number to convert it to all other bases instantly.
Percentage Off Calculator
Enter original price and discount percentage to see final sale price and savings.